CN109608182A - The method for preparing heat-stable ceramic plate - Google Patents
The method for preparing heat-stable ceramic plate Download PDFInfo
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- CN109608182A CN109608182A CN201910090443.7A CN201910090443A CN109608182A CN 109608182 A CN109608182 A CN 109608182A CN 201910090443 A CN201910090443 A CN 201910090443A CN 109608182 A CN109608182 A CN 109608182A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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Abstract
The present invention provides a kind of methods for preparing heat-stable ceramic plate, are related to ceramic field.The described method comprises the following steps: plate raw material carries out ball milling, and adjustment moisture content obtains plate green body slurry, then carries out mist projection granulating, obtain plate green body with automatic brick machine base after feed bin is aging；Glaze raw material carries out ball milling, and adjustment moisture content obtains glaze slurry, is then coated with to plate green body and obtains prefabricated blank；It by prefabricated blank pre-burning, then crushes and carries out ball milling, adjustment moisture content obtains plate slurry, carries out mist projection granulating, base obtains plate after aging；Plate is fired to obtain prefabricated board；Glaze slurry is coated on prefabricated board, temperature programming firing, program cooling down, polishing obtains finished product.The method for preparing heat-stable ceramic plate that itself please be provided, product heat resistance obtained is good, intensity is high, the coefficient of expansion is low, at low cost.
Description
Technical field
The present invention relates to ceramic fields, in particular to a kind of method for preparing heat-stable ceramic plate.
Background technique
Microcrystal glass plate and heat-stable ceramic plate are the mainstream selections of electromagnetic oven panel currently on the market, wherein with devitrified glass
Based on plate.The advantage of microcrystal glass plate is that heat resistance is good, the coefficient of expansion is small, impermeable；The main advantage of ceramic wafer is
It is cheap.
However, microcrystal glass plate fusing point is high, intensity is lower, in production process can not by the method for Full-automatic mechanized into
Row polishing can only use semi-mechanization or pure manual processing, therefore its price is generally relatively high, causes electromagnetic oven price also higher.
People want to obtain ceramic wafer similar with microcrystal glass plate performance always to substitute high devitrified glass
Plate.Then for existing heat-stable ceramic plate generally using the method production of simple primary compacting-single glazing, the coefficient of expansion is opposite
It is larger, have a water imbibition, when use, is not able to satisfy the basic need of people, and since ceramic wafer is relatively rough, market is caused to connect
It is not high by spending.
In view of this, the present invention is specifically proposed.
Summary of the invention
The purpose of the present invention is to provide a kind of method for preparing heat-stable ceramic plate, heat-stable ceramic made from the method
Plate, heat resistance is good, intensity is high, the coefficient of expansion is low, at low cost.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A method of preparing heat-stable ceramic plate, comprising the following steps:
A. plate raw material is mixed according to formula, carries out a ball milling using ball mill, after except iron, adjust moisture content
Plate green body slurry is obtained, a mist projection granulating is then carried out, obtains plate base with automatic brick machine base after feed bin is aging
Body；
B. glaze raw material is mixed by formula, carries out ball milling using ball mill, after except iron, adjustment moisture content obtains glaze
Slurry material is then coated with to the plate green body and obtains prefabricated blank；
C. the prefabricated blank is sent into roller kilns and carries out pre-burning, then crushed, carried out secondary ball milling using ball mill, pass through
After iron, adjustment moisture content obtains plate slurry, secondary mist projection granulating is then carried out, with automatic brick machine system after feed bin is aging
Base obtains plate；
D. plate feeding roller kilns are fired to obtain prefabricated board；
E. the glaze slurry is coated on the prefabricated board, is then fed into roller kilns, temperature programming firing, program drop
Temperature is cooling, and polishing obtains finished product.
Once be granulated using ball milling-- pre-burning-secondary ball milling-is secondary makes for primary aging-primary compacting-glazing-
Grain-secondary aging-secondary compacting method prepares plate, then glazing method glazing again, then is fired with programmed temperature method,
Programmed cooling method is cooling, can obtain the preferable ceramic wafer of properties.
Preferably, the plate is based on parts by weight, comprising: 15-25 parts of kaolin, 5-15 parts of talcum powder, polyvinyl alcohol
0.5-1.5 parts, 0.2-0.5 parts of citric acid, 25-35 parts of cordierite, 2-4 parts of beryllium oxide, 3-5 parts of beryllium hydroxide, strontium carbonate 5-10
Part and molybdenum oxide 0.5-1.5 parts.
In plate, the addition of polyvinyl alcohol and citric acid helps to improve the heat resistance of plate, beryllium oxide, beryllium hydroxide
Addition the intensity of product can be improved, the addition of strontium carbonate and molybdenum oxide can reduce the coefficient of expansion of plate, reduce plate
High temperature deformation.
In raw material selection, for waste utilization, solid waste accumulation bring a series of problems is reduced, realizes environmental protection most
Bigization, talcum powder can using useless talcum powder, give up it is rotten hold firing plate, talcum tailing etc., cordierite can with waste and old rotten plate come
Carry out substitution use.
It is further preferred that the prefabricated board with a thickness of 5.5-6.5mm.
It controls prefabricated plate thickness and advantageously reduces cost, additionally it is possible to the absolute value of relative efficiency reduction deformation.
It is further preferred that fineness is that 250 mesh screen residues are 1.0-1.5% after a ball milling；The secondary ball milling
Afterwards, fineness is 250 mesh screen residue 0.3-0.8%.
Fineness control is while the coefficient of expansion to can be effectively reduced to guarantee structural strength, is reduced by pyrogenetic shape
Variable.
It is further preferred that the temperature of the pre-burning is 500-700 DEG C；In the step D, firing temperature 1000-
1100℃。
The temperature for controlling pre-burning and firing, can control the variation between each component, mention for the excellent plate of processability
For basis.
It is further preferable that the moisture content of the plate green body slurry and the plate slurry is 38-42%, the glaze
The moisture content of slurry is 50-60%.
Moisture control is on the one hand to guarantee aging effect, is on the other hand in order to avoid generating in sintering procedure
Bubble and hole guarantee the intensity of product.
Preferably, the glaze is based on parts by weight, comprising: 65-75 parts of petalite, 5-15 parts of potassium feldspar, zinc oxide
4-6 parts, 4-6 parts of kaolin, talcum 6-8 parts of burning, 2-4 parts of lithium carbonate, 2-4 parts of pyrochlore, 2-5 parts of spinelle, oxidation molybdenum-iron bismuth
0.5-1.5 parts, 0.5-1.5 parts of polymethoxy dimethyl ether and 0.5-1.5 parts of triethanolamine.
In glaze, petalite is used to cool down and adjusts the coefficient of expansion, potassium feldspar and burns talcum and is used to cool down, lithium carbonate and
Zinc carbonate is used to adjust the coefficient of expansion, and zinc oxide is used to cool down and improve glaze spreading property, and kaolin is used as suspending agent and knot
Mixture, dolomite are used to enhance the transparency, and pyrochlore and spinelle are to aoxidize molybdenum-iron bismuth to improve intensity
It (Bi3FeMo2O12) is to reduce the coefficient of expansion, the use of polymethoxy dimethyl ether and triethanolamine ensure that the equal of glaze
The effect of even property and glazing guarantees mirror effect after the completion of firing, and avoids generating granular sensation.
It is further preferred that the glaze raw material, after ball milling, fineness is 250 mesh screen residue 0.03-0.08%.Preferably, institute
State temperature programming are as follows: be warming up within 30 minutes 600 DEG C, keep the temperature 5 minutes；1000 DEG C were warming up to 5 minutes again, keeps the temperature 5 minutes；It uses again
It is warming up to 1200-1300 DEG C within 2 minutes, keeps the temperature 5 minutes and be burnt into.
Optionally, described program cools down are as follows: is down within 60 minutes 800 DEG C, keeps the temperature 10 minutes；300 degree were down to 60 minutes again,
Heat preservation 20 minutes；Room temperature was down to 40 minutes again.
Temperature programming and program cooling, can preferably eliminate the stress of interiors of products, reduce the coefficient of expansion, improve strong
Degree, reduction are thermally deformed.
Compared with prior art, the invention has the benefit that product heat resistance is good, the coefficient of expansion is low；Intensity is high, no
It seeps water, is at low cost.It is easy to clean with mirror effect, good visual effect.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
Embodiment 1
Take 15 parts of kaolin, 15 parts of talcum powder, 0.5 part of polyvinyl alcohol, 0.5 part of citric acid, 25 parts of cordierite, beryllium oxide 4
Part, 3 parts of beryllium hydroxide, 10 parts of strontium carbonate and 0.5 part of molybdenum oxide, are added suitable water, carry out ball milling, ball milling 16 using ball mill
Hour, obtaining fineness is 250 mesh screen residues 1%.After except iron, adjustment moisture content to 38% obtains plate green body slurry, spraying
It is granulated and obtains the particle that partial size is 2-2.5mm, moisture content 0.8%, aging 20 hours through feed bin；Then with automatic brick machine system
Base obtains plate green body.
65 parts of petalite is taken, 15 parts of potassium feldspar, 4 parts of zinc oxide, 6 parts of kaolin, 6 parts of talcum is burnt, 4 parts of lithium carbonate, burns
2 parts of green stone, 5 parts of spinelle, 0.5 part of molybdenum-iron bismuth of oxidation, 0.5 part of polymethoxy dimethyl ether (DMMn, wherein n=3-8) and three second
0.5 part of hydramine, adds water for ball milling 20 hours according to material water quality ratio 1:0.4, obtain the glaze slurry that fineness is 250 mesh screen residues 0.03%
Material；Glaze slurry is obtained to 50% except moisture content is adjusted after iron, is then coated with to plate green body and is obtained prefabricated blank.
Prefabricated blank is sent into roller kilns and carries out pre-burning, calcined temperature is 500 DEG C；Then it crushes, carries out two using ball mill
Secondary ball milling 20 hours obtains the slurry that fineness is 250 mesh screen residues 0.3%, and after except iron, adjustment moisture content to 38% obtains plate
Then material slurry carries out secondary mist projection granulating and obtains the particle that partial size is 2-2.5mm, moisture content 0.8%, through feed bin aging 20
Hour；Then with automatic brick machine base, plate is obtained.
Plate feeding roller kilns are fired to obtain prefabricated board, firing temperature is 1000 degrees Celsius, prefabricated board with a thickness of
5.5mm。
Glaze slurry is coated on prefabricated board, roller kilns are then fed into, temperature programming firing, program cooling down are thrown
Light obtains finished product.Temperature programming are as follows: be warming up to 600 DEG C for 30 minutes, keep the temperature 5 minutes；1000 DEG C were warming up to 5 minutes again, heat preservation 5
Minute；It was warming up to 1200-1300 DEG C with 2 minutes again, 5 minutes is kept the temperature and is burnt into.Program cooling are as follows: be down to 800 DEG C for 60 minutes, heat preservation
10 minutes；300 degree were down to 60 minutes again, keeps the temperature 20 minutes；Room temperature was down to 40 minutes again.
Embodiment 2
Take 25 parts of kaolin, 5 parts of talcum powder, 1.5 parts of polyvinyl alcohol, 0.2 part of citric acid, 35 parts of cordierite, beryllium oxide 2
Part, 5 parts of beryllium hydroxide, 5 parts of strontium carbonate and 1.5 parts of molybdenum oxide, are added suitable water, carry out ball milling, ball milling 16 using ball mill
Hour, obtaining fineness is 250 mesh screen residues 1.5%.After except iron, adjustment moisture content to 42% obtains plate green body slurry, sprays
Mist is granulated to obtain the particle that partial size is 2-2.5mm, moisture content 0.8%, aging 20 hours through feed bin；Then with automatic brick machine
Base obtains plate green body.
Take 75 parts of petalite, 5 parts of potassium feldspar, 6 parts of zinc oxide, 4 parts of kaolin, 8 parts of talcum of burning, 2 parts of lithium carbonate, burning green
4 parts of stone, 2 parts of spinelle, 1.5 parts of molybdenum-iron bismuth of oxidation, 1.5 parts of polymethoxy dimethyl ether (DMMn, wherein n=3-8) and three ethyl alcohol
1.5 parts of amine, adds water for ball milling 20 hours according to material water quality ratio 1:0.4, obtain the glaze slurry that fineness is 250 mesh screen residues 0.08%
Material；Glaze slurry is obtained to 60% except moisture content is adjusted after iron, is then coated with to plate green body and is obtained prefabricated blank.
Prefabricated blank is sent into roller kilns and carries out pre-burning, calcined temperature is 700 DEG C；Then it crushes, carries out two using ball mill
Secondary ball milling 18 hours obtains the slurry that fineness is 250 mesh screen residues 0.8%, and after except iron, adjustment moisture content to 42% obtains plate
Then material slurry carries out secondary mist projection granulating and obtains the particle that partial size is 2-2.5mm, moisture content 0.8%, through feed bin aging 20
Hour；Then with automatic brick machine base, plate is obtained.
Plate feeding roller kilns are fired to obtain prefabricated board, firing temperature is 1100 degrees Celsius, prefabricated board with a thickness of
6.5mm。
Glaze slurry is coated on prefabricated board, roller kilns are then fed into, temperature programming firing, program cooling down are thrown
Light obtains finished product.Temperature programming are as follows: be warming up to 600 DEG C for 30 minutes, keep the temperature 5 minutes；1000 DEG C were warming up to 5 minutes again, heat preservation 5
Minute；It was warming up to 1200-1300 DEG C with 2 minutes again, 5 minutes is kept the temperature and is burnt into.Program cooling are as follows: be down to 800 DEG C for 60 minutes, heat preservation
10 minutes；300 degree were down to 60 minutes again, keeps the temperature 20 minutes；Room temperature was down to 40 minutes again.
Embodiment 3
Take 20 parts of kaolin, 10 parts of talcum powder, 1 part of polyvinyl alcohol, 0.4 part of citric acid, 30 parts of cordierite, 3 parts of beryllium oxide,
4 parts of beryllium hydroxide, 8 parts of strontium carbonate and 1 part of molybdenum oxide, are added suitable water, using ball mill carry out ball milling, ball milling 18 hours,
Obtaining fineness is 250 mesh screen residues 1.2%.After except iron, adjustment moisture content to 40% obtains plate green body slurry, mist projection granulating
Obtain the particle that partial size is 2-2.5mm, moisture content 0.8%, aging 24 hours through feed bin；Then with automatic brick machine base,
Obtain plate green body.
70 parts of petalite is taken, 10 parts of potassium feldspar, 5 parts of zinc oxide, 5 parts of kaolin, 7 parts of talcum is burnt, 3 parts of lithium carbonate, burns
3 parts of green stone, 4 parts of spinelle, 1 part of molybdenum-iron bismuth of oxidation, 1 part of polymethoxy dimethyl ether (DMMn, wherein n=3-8) and triethanolamine 1
Part, add water for ball milling 20 hours according to material water quality ratio 1:0.4, obtains the glaze slurry that fineness is 250 mesh screen residues 0.05%；Except iron
Adjustment moisture content obtains glaze slurry to 55% afterwards, is then coated with to plate green body and obtains prefabricated blank.
Prefabricated blank is sent into roller kilns and carries out pre-burning, calcined temperature is 600 DEG C；Then it crushes, carries out two using ball mill
Secondary ball milling 16 hours obtains the slurry that fineness is 250 mesh screen residues 0.5%, and after except iron, adjustment moisture content to 40% obtains plate
Then material slurry carries out secondary mist projection granulating and obtains the particle that partial size is 2-2.5mm, moisture content 0.8%, through feed bin aging 22
Hour；Then with automatic brick machine base, plate is obtained.
Plate feeding roller kilns are fired to obtain prefabricated board, firing temperature is 1050 degrees Celsius, prefabricated board with a thickness of
6mm。
Glaze slurry is coated on prefabricated board, roller kilns are then fed into, temperature programming firing, program cooling down are thrown
Light obtains finished product.Temperature programming are as follows: be warming up to 600 DEG C for 30 minutes, keep the temperature 5 minutes；1000 DEG C were warming up to 5 minutes again, heat preservation 5
Minute；It was warming up to 1200-1300 DEG C with 2 minutes again, 5 minutes is kept the temperature and is burnt into.Program cooling are as follows: be down to 800 DEG C for 60 minutes, heat preservation
10 minutes；300 degree were down to 60 minutes again, keeps the temperature 20 minutes；Room temperature was down to 40 minutes again.
Comparative example 1
Compared with Example 1, plate is secondary without pre-burning, a glazing and crushing-secondary ball milling-secondary granulation-
Compacting is directly obtained using a ball milling, primary granulation, primary compacting.
Comparative example 2
Compared with Example 2, temperature programming is not used when firing, using uniform temperature-rising method.
Comparative example 3
Compared with Example 3, program cool-down method is not used when cooling, using uniform decrease in temperature method.
Each 500 groups of product obtained to embodiment 1-3 and comparative example 1-3 are tested for the property.Specific test item is as follows:
1. appearance；It sees whether with mirror effect；Calculate qualification rate；
2. intensity；5kg pan is placed at the surface 30cm of product, fall rear plate face whether fragmentation；It is qualified to calculate
Rate；
3. heat resistance；Whether product edge temperature and the central point temperature difference reach 450 DEG C or more；Calculate qualification rate；
4. the coefficient of expansion；For temperature at 450 DEG C, whether the product coefficient of expansion is lower than 2.5*10-6；Calculate qualification rate；
5. whether seeping water, qualification rate is calculated.
Qualification rate is calculated according to percentage.
It is specific that test result is as follows shown in table 1:
1 test result of table
| Project | Appearance/% | Intensity/% | Heat resistance/% | The coefficient of expansion/% | Infiltration/% |
| Embodiment 1 | 100 | 99.6 | 99.8 | 99.8 | 100 |
| Embodiment 2 | 100 | 99.5 | 99.5 | 99.6 | 100 |
| Embodiment 3 | 100 | 99.7 | 99.9 | 99.7 | 100 |
| Comparative example 1 | 94.3 | 67.1 | 89.1 | 78.6 | 100 |
| Comparative example 2 | 86.9 | 98.9 | 84.2 | 68.1 | 100 |
| Comparative example 3 | 88.7 | 66.5 | 77.4 | 69.3 | 99.9 |
Above-mentioned test data shows preparation procedure provided by the present application, method for cooking, heat-stable ceramic made from cooling means
Plate, the coefficient of expansion is low, intensity is high, heat-resist, and appearance has mirror effect.
From cost, heat-stable ceramic plate made from method provided by the present application is calculated according to each 250mm size of length and width,
Every cost is at 6-8 yuans, well below the price of microcrystal glass plate.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from of the invention
Many other change and modification can be made in the case where spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of method for preparing heat-stable ceramic plate, which comprises the following steps:
A. plate raw material is mixed according to formula, carries out a ball milling using ball mill, after except iron, adjustment moisture content is obtained
Then plate green body slurry carries out a mist projection granulating, obtains plate green body with automatic brick machine base after feed bin is aging；
B. glaze raw material is mixed by formula, carries out ball milling using ball mill, after except iron, adjustment moisture content obtains glaze slurry
Material, is then coated with to the plate green body and obtains prefabricated blank；
C. the prefabricated blank is sent into roller kilns and carries out pre-burning, then crushed, secondary ball milling is carried out using ball mill, by removing iron
Afterwards, adjustment moisture content obtains plate slurry, then carries out secondary mist projection granulating, is obtained after feed bin is aging with automatic brick machine base
To plate；
D. plate feeding roller kilns are fired to obtain prefabricated board；
E. the glaze slurry is coated on the prefabricated board, is then fed into roller kilns, temperature programming firing, program cooling are cold
But, polishing obtains finished product.
2. the method according to claim 1, wherein the plate is based on parts by weight, comprising: kaolin 15-
25 parts, 5-15 parts of talcum powder, 0.5-1.5 parts of polyvinyl alcohol, 0.2-0.5 parts of citric acid, 25-35 parts of cordierite, beryllium oxide 2-4
Part, 3-5 parts of beryllium hydroxide, 5-10 parts of strontium carbonate and 0.5-1.5 parts of molybdenum oxide.
3. according to the method described in claim 2, it is characterized in that, the prefabricated board with a thickness of 5.5-6.5mm.
4. according to the method described in claim 3, it is characterized in that, fineness is that 250 mesh screen residues are 1.0- after a ball milling
1.5%；After the secondary ball milling, fineness is 250 mesh screen residue 0.3-0.8%.
5. according to the method described in claim 4, it is characterized in that, the temperature of the pre-burning is 500-700 DEG C；The step D
In, firing temperature is 1000-1100 DEG C.
6. according to the method described in claim 5, it is characterized in that, the plate green body slurry and the plate slurry it is aqueous
Rate is 38-42%, and the moisture content of the glaze slurry is 50-60%.
7. the method according to claim 1, wherein the glaze is based on parts by weight, comprising: petalite
65-75 parts, 5-15 parts of potassium feldspar, 4-6 parts of zinc oxide, 4-6 parts of kaolin, burning talcum 6-8 parts, 2-4 parts of lithium carbonate, pyrochlore 2-
4 parts, 2-5 parts of spinelle, 0.5-1.5 parts of molybdenum-iron bismuth of oxidation, 0.5-1.5 parts of polymethoxy dimethyl ether and triethanolamine 0.5-1.5
Part.
8. the method according to the description of claim 7 is characterized in that the glaze raw material, after ball milling, fineness is 250 mesh screen residues
0.03-0.08%.
9. the method according to claim 1, wherein described program heats up are as follows: be warming up within 30 minutes 600 DEG C, protect
Temperature 5 minutes；1000 DEG C were warming up to 5 minutes again, keeps the temperature 5 minutes；It was warming up to 1200-1300 DEG C with 2 minutes again, keeps the temperature 5 minutes
Firing.
10. -9 described in any item methods according to claim 1, which is characterized in that described program cooling are as follows: be down to for 60 minutes
800 DEG C, keep the temperature 10 minutes；300 degree were down to 60 minutes again, keeps the temperature 20 minutes；Room temperature was down to 40 minutes again.
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| CN115159972A (en) * | 2022-07-26 | 2022-10-11 | 佛山市越富炉具实业有限公司 | Low-expansion induction cooker ceramic panel and preparation method thereof |
| CN115894052A (en) * | 2022-09-20 | 2023-04-04 | 宜兴市隆昌耐火材料有限公司 | Wear-resistant and fire-resistant new material for preheater outside kiln and preparation method thereof |
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